Montupet S.a.

Norskhydro Asa

Denis Massinon

Philippe Meyer

Terje Iveland

Petter Åsholt

Julien Morichon

Stig Brusethaug

Bruno Barlas

Virginie Jacquet

The invention relates, according to a first aspect, to a process for the heat treatment of a cylinder head-type casting made from an aluminum alloy, in particular an alloy of aluminum, of silicon and of magnesium, and where appropriate of copper, comprising the steps of: &#x2014;solution annealing (L) of the part for a time between three and ten hours; &#x2014;quenching (S) of the part in air or in a fluidized bed; &#x2014;tempering (H) of the part at the peak of resistance, or in the vicinity of the peak of resistance to attain a level of resistance of the part at least equal to 85% of the maximum level of resistance at the tempering temperature in question. According to a second aspect, the invention relates to the castings obtained at the end of the process according to the invention, and which have an improved fatigue resistance.

Process for the heat treatment of cylinder heads made of an aluminium-based alloy, and cylinder heads having improved fatigue resistance properties

The present invention relates to a castable heat resistant aluminum alloy for high temperature applications such as components in combustion engines, in particular for the manufacturing of highly loaded cylinder heads, the alloy comprises the following composition: .Si: 6.5-10 wt %.Mg: 0.25-0.35 wt %.Cu: 0.3-0.7 wt %.Hf: 0.025-0.55 wt % Optionally with the addition of: .Ti: 0-0.2 wt %.Zr: 0-0.3 wt %, the balance being made of Al and unavoidable impurities including Fe.

Castable heat resistant aluminium alloy

A method of heat-treating a casting made of an aluminum-based alloy including an alloy of aluminum, silicon, and magnesium comprising heat treating the casting at a first temperature range for a first duration; gradually cooling the casting to a second temperature having a second temperature range; maintaining the casting at the second temperature range for a second duration; quenching the casting; and age hardening the casting.

Method for the thermal treatment of foundry pieces made from an alloy based on aluminium and foundry pieces with improved mechanical properties

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Liancourt, France

Denis Massinon